Patents by Inventor Krister Holmberg

Krister Holmberg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Binder
    Patent number: 4357454
    Abstract: A lignin product-containing binder and a process for its production are described.The lignin product consists of chlorolignin which has been treated with strong alkali (NaOH) for preferably 0.5-3 h. at 50.degree.-100.degree. C. and a pH of 10-13.5. The alkali-treated chlorolignin product can be used on its own as a binder component or, preferably, together with phenol-formaldehyde. The weight ratio phenol/lignin product is suitably from 4:1 to 1:4.
    Type: Grant
    Filed: August 20, 1981
    Date of Patent: November 2, 1982
    Assignee: Eka AB
    Inventors: Krister Holmberg, Jan-Allan Y. Johansson, Gerd E. Wallin
  • Steroid esters preparation
    Patent number: 4181669
    Abstract: This invention relates to an improved steroid ester synthesis in which a carbodiimide, in combination with an acid catalyst, is used as condensing agent.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: January 1, 1980
    Assignee: Aktiebolaget Leo
    Inventors: Bertil Hansen, Krister Holmberg
  • Method for the preparation of esters
    Patent number: 4180504
    Abstract: This invention relates to an improved ester synthesis in which a carbodiimide, in combination with an acid catalyst, is used as condensing agent.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: December 25, 1979
    Assignee: Aktiebolaget Leo
    Inventors: Bertil Hansen, Krister Holmberg
  • Novel 17-esters of 17.alpha.-hydroxy gestogens, compositions containing such compounds, processes for their preparation and methods of treatment therewith
    Patent number: 4177269
    Abstract: This invention relates to novel 17.alpha.-esters of gestogens having an antitumour activity and to the preparation thereof. The invention is also concerned with pharmaceutical compositions containing the said compounds, and method of treatment therewith.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: December 4, 1979
    Assignee: Aktiebolaget Leo
    Inventors: Hans Fex, Bertil Hansen, Krister Holmberg, Bertil Hogberg, Imre Konyves
  • Novel enol esters of steroids, compositions containing such compounds, processes for their preparation and methods of treatment therewith
    Patent number: 4150126
    Abstract: This invention relates to novel enol esters of steroids having an antitumor activity and to the preparation thereof. The invention is also concerned with pharmaceutical compositions containing the said compounds and methods of treatment therewith.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: April 17, 1979
    Assignee: Aktiebolaget Leo
    Inventors: Hans Fex, Bertil Hansen, Krister Holmberg, Bertil Hogberg, Imre Konyves